Drag and drop with copy and move

[Ang Bodhi <angbodhi pacific net sg>]

Hi,

I setup a tree view as a drag source accepting both copy and move actions
on button 1. I also set it up as a drop destination accepting both copy
and move actions. When I click button 1 to perform a drag and drop,
I get the move action, ie. drag_data_delete signal is emitted to the source.
But how do I perform a copy action?

Thanks,
Bodhi